. Elementary text-book of zoology [electronic resource]. Zoology. LUMBRICUS. 201 calciferous glands. The crop leads into the muscular which has a small opening into the long intestine. A fold of the dorsal wall, called the typhlosole^ projects into the lumen of the intestine. The alimentary canal is held in position by a complete series of transverse septa dividing the ccelom into compartments. Under the ectoderm is a layer of connective tissue Muscular t)eneath which lies a series of ciradar muscles. Inside this there is a longitudinal series. These function very much as in Arenicola. Fig. 12
. Elementary text-book of zoology [electronic resource]. Zoology. LUMBRICUS. 201 calciferous glands. The crop leads into the muscular which has a small opening into the long intestine. A fold of the dorsal wall, called the typhlosole^ projects into the lumen of the intestine. The alimentary canal is held in position by a complete series of transverse septa dividing the ccelom into compartments. Under the ectoderm is a layer of connective tissue Muscular t)eneath which lies a series of ciradar muscles. Inside this there is a longitudinal series. These function very much as in Arenicola. Fig. 125.—Transverse Section of an Earthworm in the Intestinal Region. (Semi-diagrammatic.) Yellow Cells. Dorsal Nerve Coid. Ventral Blood-vesse The coelomic fluid is nutritive and the ca'loni is spacious The blood-vascular system is easy to see for the blood Biocd (mainly respiratory) is bright red from the pre- Vascular ^^^^^ hcenioglobin (cf. Arenicola). There is a main dorsal vessel running forwards and a z^d'////'^?/backward-. These are connected by numerous cir- cular vessels, of which six at the anterior end are specially contractile and form the lateral hearts. The brain lies in the prostomium, with a nerve-ring Nervous '^^'^^^ pharynx and a double nerve-chain along the ventral surface The nerve-chain has double ganglia in each Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Masterman, Arthur Thomas; Parsons, John Herbert, Sir, 1868-1957, donor; S. H. Lazarus (Firm); University College, London. Library Services. Edinburgh : E. & S. Livingstone
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1901
