State the main function of:
(i) Erythrocytes
(ii) Lymph
(iii) Nephron.
(iv) Medulla oblongata.
(v) Retina

Explanation

(i) Transport of gases (`O_2 ,CO_2`) from the lung to the tissues
(ii) Lymph transports oxygen, hormones and nutrients to different parts of the body and removes metabolic waste from the cells.
(iii)Nephron helps in filtration, reabsorption, secretion, andexcretion.
(iv) Medulla oblongata-controls. the.involuntary activities of .the brain. (v) Retina.receive light that the lens has focused, convert the.light into neural,signals, and send theseJHgnals .on to the brain for visual recognition.