Download Baby Animals by Richard Northcott PDF

By Richard Northcott

Рабочая тетрадь для начинающих изучать английский на тему Животные и их детеныши.

метки темы:
Английский язык

Show description

Read or Download Baby Animals PDF

Best zoology books

Chasing Monarchs: Migrating with the Butterflies of Passage

The monarch butterfly is our best-known and best-loved insect, and its annual migration over millions of miles is a rare ordinary phenomenon. Robert Michael Pyle, "one of America's most interesting typical background writers" (Sue Hubbell), set out overdue one summer time to stick to the monarchs south from their northernmost breeding flooring in British Columbia.

Dorling Kindersley. RSPB Wildlife of Britain

Take a extraordinary photographic examine Britain’s vegetation and faunaFrom golden eagles within the Scottish Highlands to Portuguese guy o battle jellyfish off the coast of Cornwall, Britain boasts an extraordinary array of natural world and habitat. discover its remarkable good looks, range and beauty from the relief of your living room.

Extra resources for Baby Animals

Example text

The scalelike "hooks" are arranged in up to 120 rings and are strikingly similar to S. dayi; that is, they are tubular, attached to the skin except for the very tip, and lack a sharp point (Fig. 10A). DISTRIBUTION. This active burrower is uncommon in beaches along the Atlantic coasts of France and Spain. Siphonosoma australe australe (Keferstein, 1865) Phascolosoma australe Keferstein, 1865^422-423. Sipunculus australis. -Shipley, 1899^156. Siphonosoma australe. -E. -Haldar, 1991:22-24. —Stephen and Edmonds, 1972:61.

The degree of anastomosing makes a precise count impossible, but this attribute helps discriminate between S. funafuti and S. boholense. Multiple Rectal Caecae. Siphonosoma vastum has a rectum with numerous digitiform, appendix-like structures near the anus (Fig. 11). Origin of Introvert Retractor Muscles. In nine species the ventral pair originates posterior to the dorsal, but in 5. cumanense all four muscles originate at the same level along the anterior-posterior axis. Fusiform Bodies. Two species (S.

Trunk (Body) The larger part of the worm, into which the introvert retracts. Ventral nerve cord An unpaired, unsegmented, midventral tract that goes from the ventral side of the circumesophageal connectives, along the inner surface of the body wall, to the posterior end of the trunk. Irregularly spaced lateral nerves are present along most of its length. Wing muscle A wing-shaped sheet of muscular connective tissue that anchors the terminal rectum to the body wall. Part I I Systematics Higher Taxa and User's Guide This book is designed to be accessible to both nonspecialists and those more familiar with sipunculans.

Download PDF sample

Rated 4.35 of 5 – based on 33 votes