Question

Distinguish between the following pairs in one or two sentences for each

(a) RBCs and WBCs;

(b) bone and cartilage;

(c) blood and lymph.

(d) tendon and ligament

Answer 1

A) RBCs and WBCs :

Red blood corpuscles (RBCs)	White blood cells (WBCs)
1. They are red in colour.	1.They are colourless.
2. Size of each RBC is about 7.2 micrometer.	2.Size of WBCs varies between 10 to 20 micrometer.
3. Their number is 4 to 6 million/mm3.	3.Their number is 6000-9000/mm3.

B) Bone and Cartilage :

Bone	Cartilage
1.They are hard and flexible.	1.They are flexible.
2.They are porous.	2.They are non-porous.
3.They contain blood vessels.	3.They lack blood vessels.

(c) Blood and Lymph :

Blood	Lymph
1.It is red in colour.	1.It is colourless.
2.RBCs are present.	2.RBCs are absent.
3.Blood transports nutrients, hormones and vitamins to the tissues and transports excretory products from the tissues to the liver and kidney.	3.Lymph transports the nutrients (oxygen, glucose) that may have been filtered out of the blood capillaries back into the heart to be recirculated in the body.

(E) Tendon and Ligament :

Tendon	Ligament
It is inelastic.	It is elastic.
It connects muscles to bones.	It connects two bones.
It is made up of white fibres.	It is made up of white and yellow fibres.