Plant Anatomy. Essay

777 words - 3 pages

Angiosperms, the flowering plants, are the most highly evolved plants and the most dominant in present times. The cells of angiosperms are prearranged into different tissues and organs. The three main organs of flowering plants are roots, stems, and leaves. All the flowering plants are basically divided into two major groups or classes, the Dicots and the Monocots based on a variety of the structural appearance. Most of these features can be identified with the naked eye including, the number of seed leaves, root system, appearance of vascular bundles in stems, vein arrangement in the leaves and the number of floral parts . While monocots and dicots are composed of the same tissues (ground, vascular and dermal tissues) the arrangement of these tissues differs.The internal structure of the angiosperm root is comparatively simple. In dicots and most monocots, the three tissue systems (dermal, ground and vascular) are arranged in three layers: the epidermis, the cortex, and the vascular cylinder. The epidermis, which covers the entire surface of the root, absorbs water and minerals from the soil and protects the internal tissues. The epidermal cells of the root are characterized by fine, tubular outgrowths, known as root hairs. Most of the water and minerals that enter the root are absorbed by these root hairs. The second layer of the root is the cortex which occupies by far the greatest volume of the root . The cells of the cortex usually lack functional chloroplasts. Instead, the plastids are specialized for food storage and contain organic compounds such as starch. The many spaces in the cortex allow oxygen from the soil to enter through the epidermal cells. Unlike the rest of the cortex, the cells of the innermost layer, the endodermis, are condensed and have no spaces between them in order to regulate the passage of water and dissolved minerals . The third and the inner layer of the root is called the vascular cylinder. It consists of xylem and phloem surrounded by one or more layers of cells from which branch root arise . In most plants, the vascular tissues of the root (xylem and phloem) are grouped in a solid cylinder. However, in some monocots, the vascular tissues form a cylinder around a pith.Stems display leaves to the light and the chief functions...

Find Another Essay On Plant Anatomy.

Salinity Stress on Plants Essay

4153 words - 17 pages , R.A., Consiglio, M.F., and Joly, R.J. (2001). Unraveling the functional relationship between root anatomy and stress tolerance. Aust. J. Plant Physiol. 28, 999-1004. Maathius, F.J.M., and Amtmann, A. (1999). K+ nutrition and Na+ toxicity: the basis of cellular K+/Na+ ratios. Annals of Botany 84, 123-133. Niknam, S.R., and McComb, J. (2000). Salt tolerance screening of selected Australian woody species-a review. Forest Ecology and

Role of Biology in Life Essay

890 words - 4 pages biology is quite broad in scope and can be divided into several categories according to the type of organism study one does. In the most general sense, biology deals with the type of organism studied. Zoology, for instance, deals with animal studies, while botany is about plant studies, and microbiology about microorganisms. These fields of study can be broken down further into several specialized sub-disciplines. Some of which include anatomy

When Cultures Collide

1065 words - 4 pages negative effects of mergers and acquisition on them, a field experiment was conducted with the focus to provide a clearer picture of the effects over time of the merger and communication with employees. Two non-unionized companies were chosen for the experiment. Employees in the experimental plant were given information and media tools, held weekly meetings with regards to the merger - how it would affect them, and answers to questions regarding

The Need for Meat Consumption

1189 words - 5 pages lot of berries, and roots, and shrubbery. In order to get the nutrients that they needed for survival they had to consume large amounts of berries, and roots, and plant material. Because of this they had larger guts, but there was a drawback to having these large guts, the body would put more energy into the growth of the guts instead of into the brain. Eating Meat and marrow are calorie dense resources with essential amino acids and nutrients

Indeginous Medicine

840 words - 4 pages method they would push the lancet through the skin, the practitioner would have to have great skill to do this method because they would would have the know enough of the anatomy to know instinctually were to pierce the skin (para. Rudgley 119). When the Aleuts made contact with Russian and European nations, this method have acupuncture for healing was lost. Many methods of traditional Aleut medicine vanished with contact with Russians and

The Golden Ratio

1016 words - 4 pages sculptor Phidias (whom phi is named after) used the golden ratio in all his sculptures decorating the building. Other instances of the golden ratio are seen all over the structure itself.Not all instances of phi in real life are deliberate human creations. The phi proportion is seen occurring naturally as well. The 1.6 proportion is found in human anatomy, plant life, and sea shells to name a few. Human face shape, teeth, body proportions and even

Cells, Cancer and Gene Control

2188 words - 9 pages composition of cells that are necessary to sustain life. Now that we understand the properties of life and the composition of cells, we can focus on the architecture or formation in terms of basic anatomy and physiology as our second area of exploration. The two types of cells (prokaryotic and eukaryotic) defined before have a few common things such as Plasma membrane (similar to animal cells); Cell wall (similar to plant cells); and Ribosomes, the

they made us many promises

2866 words - 11 pages Malchow 8 Power of water in physiological systems 2, 43 Malchow 11 Exam 3 - covers weeks 8-11 13 13 Intro to osmotic regulation I 43 Malchow 15 Intro to osmotic regulation II 43 Malchow 18 Gas exchange & circulation I 45 Malchow 14 20 Gas exchange & circulation II 45 Malchow 22 Intro to Nerve & Muscle function 46, 48 Malchow 25 Plant Anatomy & Physiology I 37

Gymnosperms

1967 words - 8 pages Gymnosperms For the lower vascular plants the important evolutionary development was in the water and food conducting tissues of the sporophyte. As we move on through the plant kingdom the next important development was the seed. The free living gametophyte is a vulnerable phase of the life cycle. Reproduction by seeds is a less chancy procedure and has other advantages for plant survival and dispersal. Seeds can be remarkably tolerant of

the renneciance

676 words - 3 pages drawings, that contained designs for flying machines plant studies, war machines, anatomy and architecture.”One of da Vinci's last commissioned works was a mechanical lion that could walk and open its chest to reveal a bouquet of lilies. The famous artist died in Amboise, France, on May 2, 1519. Da Vinci's assistant and perhaps his lover, Francesco Melzi, became the principal heir and executor of his estate.” biography.com da vinvis legacy consited

the extraction of nymphaea

6177 words - 25 pages (Mart.) Solms) is a prolific free floating aquatic macrohpyte found in tropical and subtropical parts of the earth. The effects of pollutants from textile wastewater on the anatomy of the plant were studied. Water hyacinth exhibits hydrophytic adaptations which include reduced epidermis cells lacking cuticle in most cases, presence of large air spaces (7~50 μm), reduced vascular tissue and absorbing structures. Textile waste significantly

Similar Essays

Testing The Strength Of Plant Fibers

2809 words - 11 pages buoyancy of water which is essential for supporting plant tissues are not present. References: Britannica encyclopedia. 2009. Fibre (plant anatomy). Available from: http://www.britannica.com/EBchecked/topic/205799/fibre Accessed on 20th February 2009. PYSER-SGI Limited. Stage Micrometers. Available from: http://www.pyser-sgi.com/images/thumbnails/Graticules/Stage%20Micrometers%20web.pdf Accessed on 24th February 2009 Rice Unix Facility

Monarch Butterfly Essay

1000 words - 4 pages      The monarch butterfly, as known as Danaus plexippus, is often called the milkweed butterfly because its larvae eat the milkweed plant. They are also sometimes called "royalty butterflies" because their family name comes from the daughter of Danaus, ruler of Argos. There are many other interesting facts about this butterfly including its anatomy and life cycle, where the butterfly lies on the food chain

Some General Info On The Plant Kingdom... & ... Info About Bryophytes & Seedless Vascular Plants

1709 words - 7 pages , or a leafless, flattened body (thallus), as in some liverworts and all hornworts. The plant is anchored by means of threadlike structures called rhizoids. The leaflike structures and the rhizoids lack the complex internal anatomy found in the leaves and roots of plants with vascular systems. The gametophyte reproduces sexually, giving rise to a diploid, or sporophyte, generation; the sporophyte is a structure that grows directly out of the

Eating Meat Is Ethical Essay

1523 words - 6 pages well as the concern of the environmental burden caused by the production of meats is debatable. However, animal based diet is necessary for the human body to function properly and we can choose the meat produced from environmentally sustainable farms to avoid the moral ambiguity. Anatomy and Physiology Factor Some group of people who live on a plant-based diet argues that the human digestive system does not digest animal meat well. Mills (2009