Soon after the formation of the testis, the Leydig cells begin to secrete testosterone. Testosterone can influence tissues that are bipotential to become male reproductive structures. For example, with exposure to testosterone, cells that could become either the glans penis or the glans clitoris for...
Human Reproduction: An introduction Biology 12 Overview: During puberty the reproductive organs mature to create a fertile individual capable of reproducing. The primary sex organs produce the sex cells (egg/sperm) and sex hormones. The accessory sex organs are all the components involved in maintain...
These gametes fuse in a favourable environment to give rise to a new organism or offspring. Browse more Topics under How Do Organisms Reproduce Asexual Mode of Reproduction Reproduction in Human Beings Sexual Reproduction in Flowering Plants In Plants Sexual reproduction in plants happens in flowering...
This song is available on Lyrical Learning's Lyrical Life Science Volume 3: The Human Body Cells that work together in your body form tissues Tissues form the organs, organs form systems in you These systems work together to keep your body alive The nervous system makes them all react so ...
Introduction to the Human Body and Fundamentals - Learn about from the Merck Manuals - Medical Consumer Version.
By the broadest definition, a body cavity is any fluid-filled space in a multicellularorganism. However, the term usually refers to the space where internal organs develop, located between the skin and the outer lining of the gut cavity. “The human body cavity,” normally refers to the...
4、eases6 major unconquered human tropical diseases (WHO)Malaria (疟疾)Schistosomiasis(血吸虫病)Filariasis (丝虫病) Leishmaniasis(利什曼病)Trypanosomiasis(锥虫病)Leprosy(麻风病)Malaria population is at risk from catch malaria Endemic in 109 countries in 4 continents500 million cases estimated to occur ...
Plowes & Adams 2005). Social insects provide excellent inspiration for the burgeoning field of biomimicry, wherein everything from task allocation (Kriegeret al. 2000) to nest architecture (Turneret al. 2008) has been shaped by natural selection and can serve as inspiration to solve human probl...
Human Papillomavirus (HPV) infection is the most common sexually transmitted disease worldwide [1]. More or less 233.9 million women were infected by the HPV virus most of which were eliminated by the immune system [2]. It is spread by skin to skin contact and sometimes is occurred with a...
The vagina is a functional organ of the female reproductive organ system. It extends from the vulva externally to the uterine cervix internally and is located within the pelvis, anterior to the rectum and posterior to the urinary bladder. The vagina lies at a 90° angle in relation to the ...