Blood is commonly called red vascular connective tissue as its matrix is fluidy, mobile and fibre-free, and is red-coloured due to presence of haemoglobin in its RBCs. Blood is formed of two components: Plasma and Blood corpuscles. Its blood corpuscles are of three types Erythrocytes, Leucocytes and blood platelets. Leucocytes are of five types which are adapted to perform different functions.
Answer the following questions related to blood:
(i) List two structural peculiarities of its RBCs of human blood.
(ii) Tabulate two differences between its five types of leucocytes.
(iii) Define diapedesis .

Explanation

(i) RBCs of human blood are denucleated and biconcave, and is bounded by an elastic plasma membrane while their cytoplasm contains large amount of haemoglobin.

(iii) Capability of leucocytes of blood to come out of blood capillaries by amoeboid movements is called diapedesis .