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BLOOD VESSELS -
1. Tunica Externa - Made up of connective tissue, collagen fibres present.
2. Tunica media - Thick, made up of smooth muscles arranged in circular way.
3. Tunica interna - Inner most layer. Outerly made up of yellow elastin fibre. Inner layer is of endothelial cells.
S.NO.
ARTERY
VEIN
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Carry blood away from heart
Pure blood flows
(in pulmonary artery impure blood flows)
Blood flows with jerk
Blood flows with more pressure
Walls are thick
Lumen is narrow
Not collapse after death
Deeply placed
Valve absent
Wall firm
Towards heart
Impure blood flows
(In pulmonary vein pure blood flows)
Steady
Less pressure
Thin
Broad
Collapse
Superficially placed
Present to check back flow
Elastic
Eucaryotic Cell Organelles A eucaryotic cell has excessive foldings of intrace!:u:;ir cembrane as compared to procaryotic cell. The eucaryotic cell has a number of'organelles s
Maintenance and Regulation of Peripheral Circulation Pressure receptors (baroreceptors) located in the wall of the internal carotid arteries and in the arch of aorta, when
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a) What are the needsfor an organism to be an indicator organism? b) In Australia, National Parks and coastal beaches attract various visitors during holiday periods. EPA is
Carbohydrate characteristic chemical features include: Select one: a. the potential to form multiple hydrogen bonds. b. the existence of one or more asymmetric centers.
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How do embryos of placental mammals excrete nitrogen wastes? Placental animals, as well as embryos, excrete urea. In the adult placental mammal urea is excreted by the urine.
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