WebIn each segment of the body from 7th to the last segment, numerous nephridia are found attached inside the lining of the body wall. These are called integumentary nephridia which are about 200-250 in each segment except the segment of the clitellar region where they number 2,000-2,500 in each segment. ADVERTISEMENTS: WebCorrect option is B) Blood glands are present on the 4th, 5th, and 6th segments. They produce blood and hemoglobin which is dissolved in blood plasma. Blood cells are phagocytic in nature. Pheretima exhibits a closed type of blood vascular system, consisting of blood vessels, capillaries, and heart.
Pharyngeal nephridia of earthworm Pheretima occur in segments
WebCoelomic fluid of earthworm is alkaline, colourless fluid containing water, slats some proteins and corpuscles. Haemoglobin is not present in coelomic fluid. It is found dissolved in blood plasma giving red colour to blood. Blood is confined to heart and vessels in closed circulatory system. WebHe states that in Pheretima the oesophagus receives in segment v the ducts of the “ oesophageal glands,” a pair of conspicuous organs looking when magnified like a bunch of red grapes ; and repeats this description in a subsequent paper of the same year (10), where a large duct is shown in a figure drawn with the camera lucida. mount for stick up cam 2nd and 3rd generation
An Example of Phylum Annelida: Earthworm - Biology Discussion
WebThe blood glands are located in the 4th, 5th and 6th segments. These blood glands produce blood cells and haemoglobin. The blood glands are phagocytic in nature. So, … WebOne very special feature in the earthworm Pheretima is that. 1. the typhlosole greatly increases the effective absorption area of the digested food in the intestine. 2. the S-shaped setae embedded in the integument are the defensive weapons used against the enemies. 3. it has a long dorsal tubular heart. WebTotal number of body segments in Pheretima is about - A. 50 – 75. B. 300 – 325. C. 150 – 200. D. ... Chromophil cells are found around the Pheretima gut. They occur in the region of-A. Stomach. B. Gizzard. C. Intestine. D. ... Blood glands in pheretima are concerned with-A. Blood formation. B. Blood formation and excretion. C. mountfort