Search Results for: puberty
Physical Development in Humans
The Newly Born Child Depending on the nutrients available to the child within pregnancy and the genetic makeup of the... Read More
Human Reproduction
Terminology and Concepts Primary reproductive organs are called gonads - testes in the male and ovaries in the female.... Read More
Human development
Definition noun The study of the chronological processes or changes that occur from fertilization to the formation of the... Read More
Vellus hair
Definition noun Very fine, non-pigmented hair that covers most of the body of human and other mammals Supplement The vellus... Read More
Terminal hair
Definition noun The mature type of hair characterized by being pigmented, thicker, and with a larger diameter than the... Read More
Germinal vesicle
Definition noun The large nucleus of the primary oocyte before meiosis is completed and polar bodies are... Read More
Diakinesis
Definition noun The final stage of prophase I of meiosis I in which the chromosomes condense, the nucleolus fragments and... Read More
Biological clock
Definition noun, plural: biological clocks Any of the various mechanisms that regulate biological rhythms Supplement A... Read More
Sleep and Dreams – Neurology
The Falling Asleep Process During the day when we are awake, our body and brain are working tirelessly to operate our body,... Read More
Principles of Hormonal Control Systems
Hormones are chemical messengers that enter the blood directly upon their secretion from endocrine glands. A single gland or... Read More
Developmental Biology
Developmental biology is a biological science that is primarily concerned with how a living thing grows and attains... Read More
Anabolic steroid
Definition noun, plural: anabolic steroids Any of the synthetic steroid hormones (androgens) that promote muscle and bone... Read More
Klinefelter syndrome
Definition noun A genetic condition in a male characterized by the presence of at least one extra X chromosome Supplement In... Read More
Doderleins bacillus
Doderlein's bacillus is a large, Gram-positive bacterium found in vaginal secretions. It is named after the German... Read More
Apocrine gland
The human body is a complex assemblage of many different organs, systems, glands, bones, and tissues. Weighing any one over... Read More
Primary oocyte
Definition noun, plural: primary oocytes The oocyte that arises from the oogonium via the process of oocytogenesis, and... Read More
Spermiogenesis
Spermiogenesis Definition Spermiogenesis is the stage of spermatogenesis wherein the spermatids differentiate into mature... Read More
Leydig cell
Leydig cell interstitial cells of the mammalian testis, involved in synthesis of testosterone. leydig cell Leydig cells,... Read More
Ethmoid air cells
Definition noun The numerous tiny-walled, fluid-filled cells that lie in the ethmoid bone of the skull (i.e. specifically... Read More
Ethmoidal labyrinth
Definition noun, plural: ethmoidal labyrinths Either of the paired lateral masses of the ethmoid bone, consisting of the... Read More
Reproductive system
What is the Reproductive System? The reproductive system of an organism is the biological system made up of all the... Read More
Menstruation
Definition noun The periodic physiologic discharge through the vagina of blood, cervical mucus, vaginal secretions, and... Read More
Spermatogenesis
Spermatogenesis Definition Spermatogenesis is the biological process of producing sperm cells. It occurs in the male gonad... Read More
Animal Growth Hormones
Reviewed by: Mary Anne Clark, Ph.D. As mentioned in the previous tutorial, hormones are produced in... Read More