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What type of respiration does earthworm has? In many complex animals, the cells of internal organs are distant from the outside environment; respiratory systems provide the passage of gases to or from internal tissues. In such kind of systems, there is a difference in pressure of a specific gas on opposite sides of a membrane, the gas diffuses from the side of greater pressure to side of lesser pressure, or each gas is transported independently of other gases. For i.e., in tissues a carbon dioxide concentration is high or oxygen concentration is low as a product of active metabolism, oxygen diffuses into the carbon dioxide and tissue diffuses out.
In many lower animals, gas diffusion takes place through a moist surface membrane, as in flatworms; through the thin body wall, as in earthworms; through air ducts, or tracheae, as in insects; or through specialized tracheal gills, as in aquatic insect larvae. In the gills of fish the blood vessels are exposed directly to the external aquatic environment. Oxygen–carbon dioxide swap occurs between the surrounding water & the blood within the vessels; the blood carries gases to and from tissues.
Q. How are the female gametes of gymnosperms formed? What is the relationship between this process and the concept of alternation of generations? In the female strobiles (cones
Classification of the Phylum Protozoa up to orders
E s o pha g e a l obstruction It is also known as choke. It may be acute or chronic and is characterized by inability to swallow, regurgitation and bloat. E t
Q. What are the two major ions that participate in the electrical impulse transmission in neurons? The two major ions that participate in the electrical impulse transmission in
TYPES OF FOSSILS - S.No. Fossil E xample M ode of formation 1 Unaltered (Preservation) Wo
Hygroscopic Coeflicient To have a more complete picture of soil moisture relations, let us take a soil sample and oven dry it for 24 hours at 11 o C. Now if this soil is kept i
a) Produce annotated diagrams that illustrate how nerve impulses travel i) along a neurone ii) across a synapse.
Ask quYour organs are wonderous things, each one with a different function vital to the homeostasis of your body. While it is easy for us to view a particular organ as a single ite
As heart failure sets in, there is activation of RAS (Fig 2.1). Adrenergic stimulation of beta-1 receptors in juxtaglomerular apparatus of the kidneys results in release of renin.
What is Active site Active site : The site on the surface of an enzyme to which substrate or substrates bind.
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