Fish take food from the aquatic environment for life sustaining, body building and growth. Different species of fish feel comfortable in different aquatic environments. The foods that fish consume from different aquatic environments are varied. Fish consume a large number of living ingredients and inert substances as food. Fish eating techniques are more diverse and … Read more
The heart is a special pump device with a valve in the circulatory system. In case of fish, the heart is a folded tube that contains three or four enlarged areas. The blood brought through the veins travels from the heart to the gills through the ventral aorta and the heart always contains carbon dioxide … Read more
Different parts of the body, especially the excretory system, are involved in the removal of waste products produced by metabolism. The process of removing nitrogenous wastes from the body is called excretion. The subsidiary system of excretory function is known as excretory system. These excretory substances are formed by the accrual reaction of amino acids. … Read more
Lampreys are eel like scaleless and jawless animals which belongs to the family Petromyzontidae under order Petromyzontiformes of class Cephalaspidomorphi. They are found in coastal and freshwater habitats around the world except Africa. They can grow up to 100 cm in length with well-developed eyes. They have one or two dorsal fins with seven gill … Read more
The lungfish is the oldest living animal on earth. It lives in muddy waters in Africa, South America, and Australia. What seems most surprising about these creatures is that they can survive without breathing air. They have developed the ability to respire through their skin, mouth, and gills. These fish can live without oxygen for … Read more
All human bodies are made up of four different types of tissues: muscle, nerve, blood, and skin. Each tissue has its own role to play in the body. For example, skin is the largest organ in the human body. It helps protect us by keeping out pathogens and absorbing moisture. It also protects against injury … Read more