File Name: morphology and anatomy of earthworm ppt to .zip
- Earthworm- Habit, Habitat, Morphology, Bodywall, Locomotion
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- Earthworm Anatomy and Dissection Guide
Earthworm - Lampito mauritii. Earthworm is a terrestrial invertebrate that inhabits the upper layers of the moist soil, rich in decaying organic matter.
Earthworm- Habit, Habitat, Morphology, Bodywall, Locomotion
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No notes for slide. Earthworm 1. It secretes mucus and albumen for the formation of cocoon or egg capsule. It grinds the food with the help of thick muscles and cuticle 6. Highly vascular and glandular walls. The chalky secretion of the calciferous glands neutralise the humic acid in the humus 7.
A pair of short and conical intestinal caecae project from the intestine on the 26th segment. The characteristic feature of the intestine between segments is the presence of internal median fold of dorsal wall called typhlosole. This increases the effective area of absorption in the intestine. ANUS The alimentary canal opens to the exterior by a small rounded aperture called anus 7. Due to closed circulatory system blood is confined to the heart and blood vessels.
It has valves and receives blood from various parts of the body ii Ventral blood vessel : Also extends from end to end but it does not have valves. It is the main distributing vessel. They produce blood corpuscles and haemoglobin.
The respiratory pigment,haemoglobin is present in the plasma and helps in transport of oxygen. The only type of blood cell is the leucocyte and hence is phagocytic in nature. Pharyngeal three paired tufts in the 4th, 5th and 6th segments 2. Integumentary attached to lining of the body wall of segment 3 to the last that open on the body surface 3.
Septal present on both the sides of intersegmental septa of segment 15 to the last that open into intestine - These different types of nephridia are basically similar in structure - Nephridia regulate the volume and composition of the body fluids. The Nervous System is made up of an Anterior Nerve ring and Posterior Nerve cord Nervous system is basically represented by ganglia arranged segment wise on the ventral paired nerve cord.
Each sac encloses a testis and a spermiducal funnel Testis - There are two pairs of testes in 10th and 11th segments. Seminal Vesicle There are two pairs of seminal vesicles in 10th and 11th segments Spermiducal funnel - There are two pairs of spermiducal funnels one in 10th segment and the other in 11th segment.
Vasa deferentia - There are present two pairs of vasa deferentia. Each spermiducal funnel leads into a vasa deferens. In 18th segment, both the vasa deferentia of each side are joined to the prostate duct coming from the prostate gland.
They open to the outside separately into male genital aperture. They produce ova. Oviducts - They are two short tubes each lying immediately behind the respective ovary. They store the sperms received from another earthworm during copulation After about 3 weeks, each cocoon produces two to twenty baby worms with an average of four.
Earthworms development is direct, i. You just clipped your first slide! Clipping is a handy way to collect important slides you want to go back to later. Now customize the name of a clipboard to store your clips. Visibility Others can see my Clipboard. Cancel Save.
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An earthworm is a terrestrial invertebrate that belongs to the phylum Annelida. They exhibit a tube-within-a-tube body plan , are externally segmented with corresponding internal segmentation, and usually have setae on all segments. It has a double transport system made of coelomic fluid that moves within the fluid-filled coelom and a simple, closed circulatory system. It has a central and peripheral nervous system. Its central nervous system consists of two ganglia above the mouth, one on either side, connected to a nerve running along its length to motor neurons and sensory cells in each segment. Large numbers of chemoreceptors concentrate near its mouth.
Earthworm Anatomy and Dissection Guide
It is composed of. Digestive system. It has. It increases area of absorption. Digested nutrients are absorbed through intestinal membranes.
Last Updated on October 2, by Sagar Aryal.
The following is a classification of a species in the earthworm family Lumbricidae. This common species is Lumbricus terrestris also known as the night crawler or dew worm. In this article, we will cover earthworm anatomy and an introduction on dissecting an earthworm. Materials: Safety goggles, dissecting pins, gloves, forceps, lab safety apron, scissors, paper towel, scalpel, water, dissecting probe, preserved earthworm, hand lens, dissection tray.
В руке красная туристская сумка фирмы Л. Белл. Светлые волосы тщательно уложены. - Прошу меня извинить, - пробормотал Беккер, застегивая пряжку на ремне.
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