Postnatal

Their extended bodies are surrounded by bony rings with small gill slits (Zubi, 2004). Their fin patterns and distributions are different than those for other bony fish. They have no pelvic fins, small pectoral fins, and one dorsal fin (Zubi, 2004). The pectoral fins turn the Seahorse and aid in steering, while the dorsal fin moves it forward. The coronet of the Seahorse is its most distinctive feature, helping in identification as the thumbprint does for humans (Zubi, 2004). Seahorses are…

Differences in Physiological Effects Among Various Addictive Substances Recently, many states have been debating the legalization of Marijuana. Many who are against legalizing it claim that it will serve as a “gateway drug”, and lead to an increase in the amount of drug users in the United States. This idea begs the question of how people become addicted to drugs that ultimately ruin their lives by tearing apart their families, causing them to lose their jobs, and having detrimental and often…

Regenerative Medicine Regeneration is not a new idea at all, lizards have been doing it for thousands of years! According to BioMedCentral.com, Aristotle observed a lizard regenerating its tail in 330 BC (Jessop). However, lizards are not the only animals capable of regenerating a lost or damaged appendage; Zebrafish can regrow a lost fin or even a heart, newts and other amphibians can regrow entire limbs, starfish can regrow their entire body from just a single limb, and a deer can…

In virtually every language, the term for Abirthmark@ can be translated as some variant of the terms Aenvy,@ Awish,@ Alonging,@ or “mother’s mark.” Does this suggest anything to you about what people in the past thought might be the causes of birthmarks? something the mother did caused the birth mark? D. Birth Process 14. Childbirth is conventionally divided into three stages. What are they?  mother experiences regular uterine contractions that are usually spaced to 10 to 15 minute…

Introduction In vertebrates, reproduction is primarily controlled by the hypothalamus-pituitary-gonad axis. The gonadotropin-releasing hormone (GnRH) neurons in the hypothalamus are key regulators of the hypothalamic neuroendocrine system mainly though the synthesis of GnRH (Moenter et al., 2003). The decapeptide GnRH is released from the hypothalamus in a pulsatile manner, and the amplitude and frequency of these pulses change throughout the estrous cycle (McCartney et al., 2002; Moenter et al.…

A brief discussion of some of the factors often associated with adolescent pregnancy will follow. 2.3.1 Female Gender Role Firstly, three concepts need to be defined, that is, gender; gender role and gender typing. According to Galambos (2004) the term ‘gender’ refers to characteristics learnt or acquired by either sex from their society. It is part of that by which individuals define themselves, and give meaning to their actions. Gender role on the other hand refers to appropriate behaviour for…