Question

give difference between close and open circulatery system

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Answer 1

Answer:

(a) 17 = x + 7 (b) (t - 7) > 5 (c) 2 = 2

(d) (7 3) - 19 = 8 (e) 5 x 4 - 8 = 2 x (f) x - 2 = 0

(g) 2m < 30

(h) 2n + 1 = 11 (i) 7 = (11 x 5) - (12 x 4)

(j) 7 = (11 x 2) + p (k) 20 = 5y

3q

(1)

2

<5

(n) 20 - (10-5) = 3 x 5

(m) z + 12 > 24

(0) 7-X= 5

Answer 2

OPEN CIRCULARTORY SYSTEM

• The hemolymph directly bathes the organs and tissues.
• THE blood and interstitial fluid cannot be distinguished.
• Present in molluscs and arthropods.
• Blood is pumped into the body cavity.
• Dorsal blood vessels present.
• Capillary system is absent .

• Blood is in direct contact with the surrounding tissues.
• Nutrients are exchanged directly between blood and tissues.
• No transport of gases.

CLOSED CIRCULARTORY SYSTEM

• the blood circulates within closed vessels.
• Blood and interstitial fluid are distinct.
• Present in annelids and vertebrates
• Blood is pumped through the vessels present .
• Capillary system is present.

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