___________________________ biood circulates between the heart and body organs (except lungs).
Blood
Systematic circulation
The liquid connective tissue A circulates in our body continuously without stopping. This tissue contains a pigment B which imparts it a colour C. The tissue A consists of four components D, E, F and G. The component D fights infection and protects us from diseases. The component E helps in the clotting of tissue A if a person gets a cut. The component F is a liquid which consists mainly of water with many substances dissolved in it and component G carries oxygen from the lungs to all the parts of the body. (a) What is (i) tissue A (ii) pigment B, and (iii) colour C? (b) Name (i) D (ii) E (iii) F, and (iv) G. (c) Name one substance (other than oxygen) which is transported by tissue A in the human body. (d) Which two components of tissue A are the cells without nucleus (e) Name any two organisms (animals) which do not have liquid like A in their body.
The human body has an organ A which acts as a double pump. The oxygenated blood coming from the lungs through a blood vessel B enters the upper left chamber C of the double pump. When chamber C contracts, then blood goes into lower left chamber D. The contraction of chamber D forces the blood to go into a blood vessel E which supplies oxygenated blood to all the organs of the body (except the lungs). The deoxygenated blood coming out of the body organs is taken by a blood vessel F to the right upper chamber G of pumping organ. Contraction of chamber G forces the deoxygenated blood into right lower chamber H. And finally the contraction of chamber H sends the deoxygenated blood into lungs through a blood vessel I. (a) What is organ A? (b) Name the blood vessel (i) B (ii) E (iii) F, and (iv) I. (c) What are chambers (i) C, and (ii) D (d) What are chambers (i) G and (ii) H?
Assertion (A): A complex of veins beginning and ending in capillaries through which blood circulates before returning to the heart is called a portal system.
Reason (R): All mammals have a hepatic portal system.