أكاديميا - كولنز معاجم الجيب العلمية - البيولوجيا انكليزي - فرنسي - عربي الحرف _ u

Academia - Collins Scientific Pocket Dictionaries - Biology
English - French - Arabic letter _ U


ulna
cubitus m

ulna. Posterior bone: the lower part of the forelimb of a quadruped. In humans, it is the largest of the forearm bones. See endoskeleton.


unicellular (of an organism) unicellulaire

Unicellular (for organism). A membership consisting of only one cell. Single-celled organisms include protozoans, bacteria, and some algae. Compare with multicellular organisms.


urea
uree f

A urine. The main nitrogenous excretion product in mammals. Urine is produced in the liver from deamination of excess amino acids, and then the urea is excreted through the kidneys.

. H2N - O = C - NH2 urea

ureter
uretère m

Milker. The tube that carries urine from the kidney to the bladder in vertebrates. See kidney.


urethra
urètre m

The urethra is a mammalian tube that transports urine from the bladder to outside the body. It also serves in male mammals as a sperm exit duct.
See fertilization in humans and kidney


uterus (or Womb)
uterus m. matrice f

womb. A muscular cavity found in most females
Mammals contain embryo(s) during their development. The uterus receives the eggs from the oviduct and is connected to the outside by the vagina.
see fertilization in humans
pregnancy and


urine
urine f

pee . A solution of urea and salts in water produced by a mammal's kidney. Urine is stored in the bladder before being excreted through the urethra.