Question

Name Section Exercise 1. Comparative Anatomy Animal Hydra Type of Circulatory System Outstanding Features Advantages Disadvantages Earthworm Grasshopper Fish Frog Crocodile Turtle Bird Dog Human

Answer 1

Animal	types of circulatory system.	Feature.	advantage.
Hydra	gastro vascular cavity.	Has regenerative capacity, senescense.	Able to survive in water with low dissolved oxygen concentration because algae supply oxygen.
Earthworm	closed type in which blood circulates through vessels	make soil productive, aeration,compaction, provideorganic matter to soil.	Ability to destroy young and tender plant.
Grasshopper	open type in which body cavity are filled with haemolymph.	Herbivore,like crickets they too have chewing types of mouth parts.	Benefits to humans, ecosystem by facilitating decomposition ,regrowth creats balance between types of plants.
Fish	single circulation means blood pumped through cappiliaries of gills and on to the capillaries if body tissue.	These are cold blooded animals,they don't maintain constant internal body temperature instead their temperature influenced by environment.	health benefits of lowers triglycerides, b blood pressure, inflammation, reduces heart disease and stroke.
Frog	closed type, blood is maintained in vessels and pumped by heart.	It has no tail except larvae,have long hind legs, elongated ankle bone,webbed toes,no claws,large eyes.	They are efficient transfer of solar energy .
Crocodile	complex circulatory system, 4 chambered heart.	Powerful jaws with many conical teeth,short legs with clawed webbed toes.	It's meat is low fat,low cholesterol,high protein meat.
Turtle	simple type with heart, veins, arteries, cappilaries.	Characterized by bony shell develop from ribs and acts as shield.	Provide habitat for aquatic hitchhikers like barnacles, algae, diatoms.
Bird	4 chambered heart.with each heart beat large volume of blood carried through out vessels called arteries.blood then returned to heart by vessels called veins.	These nature's best athlete's.
Dog	each contraction of heart muscle pump blood to body supply to organs .	Read our emotions,feels jealous	keep u fit , active, imprive your social life.
Human	contain 3 independent systems with cardiovascular, pulmonary, systemic vessels.	They were intelligent as compared with other mammals as they evolved from ancestors.	Bring changes in technology through highly developed brain.