Liver is an essential organ of the body. Its functions are numerous which are briefly summarised below: 1. In Connection with Blood and Circulation: i. R.B.C. formation—in foetal life. ii. R.B.C. destruction—in adult life. iii. Storehouse of blood and regulates blood volume. iv. Relation with blood clotting. a. Manufactures prothrombin (with the help of vitamin K) and fibrinogen and thus [...]
In this article we will discuss about the structure of a leaf with the help of a diagram. A leaf is a compromise between two conflicting evolutionary pressures. The first is to expose a maximum photosynthetic surface to sunlight; the second is to conserve water while, at the same time, providing for the exchange of gases necessary for photosynthesis. The [...]
The internal structure of the root is comparatively simple. There are three concentric layers: 1. The epidermis, 2. The cortex, and 3. The vascular cylinder. 1. The Epidermis: The epidermal cells of the root, which enclose the entire surface of the root, absorb water and minerals from the soil. As you would expect, they lack the cuticle found on the [...]