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08048036175
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Earthworm: Ext. Morphology & Reproduction (55x90cm)

INR 201
In stockcod available
Phone Number

08048036175

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Email Address mnc.naveen@gmail.com

Mon-Thu: 10 AM - 2 PM • Fri: 3 PM - 7AM

Address Correspondence Address: Shop No. 20, 2nd Floor, Srirama Tower, Bogulkunta, Telangana

Hyderabad, India, 500001

Description

An “Earthworm: External Morphology & Reproduction” (55×90 cm) educational chart presents clear, colored diagrams of the earthworm’s segmented body, key external features, and detailed notes on its reproductive systems and process, supporting zoology teaching and laboratory reference.​ External Morphology Body Plan and Segmentation: The earthworm is long, cylindrical, bilaterally symmetrical, and divided into 100–120 rings or segments (somites). The dorsal surface has a visible dark blood vessel; the ventral side features genital openings and papillae.​ Key Features: Mouth and Prostomium: Crescent-shaped mouth at the anterior end, just below a lobe called the prostomium, which assists in digging.​ Clitellum: A prominent thickened glandular ring encircling segments 14–16 in mature worms, critical for reproduction and cocoon formation.​ Setae: S-shaped bristles in each segment (except the first, last, and clitellum) for locomotion; diagram often shows arrangement and structure.​ Apertures: Mouth (1st segment), anus (last segment), spermathecal pores (segments 5/6 to 8/9), male genital pores (18th segment), and female genital pore (14th segment).​ Reproductive System & Process Hermaphroditism: Each earthworm has both male and female reproductive organs (bisexual).​ Male System: Testes (segments 10–11), vasa deferentia, accessory glands, prostate gland, and male pores (18th segment).​ Female System: Ovaries, oviducts, and female genital pore (14th segment).​ Spermathecae: Pairs of storage sacs (segments 6–9) for receiving sperm during mating.​ Reproductive Process: Earthworms reproduce sexually via cross-fertilization. During copulation, two worms align ventrally, exchange sperm, and store it in spermathecae.​ Clitellum secretes a mucus cocoon; eggs, stored and received sperm, and nutritive fluid are deposited and the cocoon slips off, where fertilization occurs externally. Direct development leads to young hatchlings.​ This chart is ideal for visualizing anatomy, identifying reproductive and external features, and explaining earthworm biology in school or undergraduate study.

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