Question

biology question with reasons as answers...

Answer 1

the left side of heart flows pure blood and right side in heart impure . arteries are thicker than veins because the artries have to pump the pure blood by heart to various body parts but veins don't need this so left ones thicker in heart

Answer 2

Answer & Explanation:

i) Because of its absence, it elevates the surface area-volume ratio of RBCs, thus elevating the area for oxygen absorption which gets more space for vital cells.

ii) As the exocrine gland, it produces enzymes to digest starch, fat & proteins, such as amylase, lipase, and protease & as an endocrine gland (secreting into the bloodstream), this would secrete insulin

iii) Because it assists to pump blood for systemic circulation (all vessels and tissues) whereas the latter one is for pulmonary circulation (blood to lungs)

iv) Because it controls involuntary functions such as heartbeat, rate of respiration, etc.

v) Due to Cold diuresis, where core of body tries to keep hot via vasoconstriction (reducing flow of blood in skin)