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Syringomyelia is a generic term referring to a disorder in which a cyst or cavity forms within the spinal cord.Often, syringomyelia is used as a generic term before an etiology is determined. [3]
1901 illustration of the female reproductive system of a horse ; clitoris labeled as 17. Although the clitoris (and clitoral prepuce/sheath) [189] [190] exists in all mammal species, [9] there are few detailed studies of the anatomy of the clitoris in non-humans. [191] Studies have been done on the clitoris of cats, sheep and mice.
The Tanner scale, which is used to assess the maturity of the male genitalia, assigns a maturity stage to the calculated volume ranging from stage I, a volume of less than 1.5 cm 3; to stage V, a volume greater than 20 cm 3. Normal volume is 15 to 25 cm 3; the average is 18 cm 3 per testis (range 12–30 cm 3). [1]
Earthworm head. Depending on the species, an adult earthworm can be from 10 mm (0.39 in) long and 1 mm (0.039 in) wide to 3 m (9.8 ft) long and over 25 mm (0.98 in) wide, but the typical Lumbricus terrestris grows to about 360 mm (14 in) long. [9]
The Three Mile Island accident was a partial nuclear meltdown of the Unit 2 reactor (TMI-2) of the Three Mile Island Nuclear Generating Station on the Susquehanna River in Londonderry Township, near Harrisburg, Pennsylvania.
Sexual maturation depends on environmental temperature and photo-period. [18] Longer days and warmer days stimulate brighter colouration in males and the development of eggs in females. From late April, males and females move from deeper waters to shallow areas. There, each male defends a territory where he builds a nest on the bottom. He ...
Much of the nomenclature, methods, and applications for the study of anatomy can be traced back to the works of the ancient Greeks. [3] In the fifth-century BCE, the philosopher Alcmaeon may have been one of the first to have dissected animals for anatomical purposes, and possibly identified the optic nerves and Eustachian tubes. [4]
A common bottlenose dolphin (Tursiops truncatus). A dolphin is an aquatic mammal in the clade Odontoceti (toothed whale).Dolphins belong to the families Delphinidae (the oceanic dolphins), Platanistidae (the Indian river dolphins), Iniidae (the New World river dolphins), Pontoporiidae (the brackish dolphins), and possibly extinct Lipotidae (baiji or Chinese river dolphin).