Explain the differences.

External and internal respiration.

Answer the following questions in your own words.

Explain the importance and need of blood donation.

Explain the differences.

Arteries and veins.

Which health parameters of blood donor should be checked?

Fill in the blanks using appropriate words given in the bracket. (Haemoglobin, alkaline, diaphragm, red bone marrow, acidic, voluntary, involuntary,)

a. RBCs of the blood contain ----------, an iron compound.

b. ---------- is present between thoracic and abdominal cavity.

c. Cardiac muscles are ----------.

d. pH of oxygenated blood is ----------.

e. Production of RBCs occurs in ----------.