أكاديميا - كولنز معاجم الجيب العلمية - البيولوجيا انكليزي - فرنسي - عربي الحرف ٥_ p

Academia - Collins Scientific Pocket Dictionaries - Biology
English - French - Arabic letter 5_P


population
population f

group A group of members of a species
Himself within the community.


posterior
postérieur

behind me . A description of the body parts located at or near the back end of the animal. Compare with anterior.


predator
predateur m

An animal predator that feeds on other animals is called preys, meaning that the predator is a food consumer (but it is not a parasite). The relationship between predator and prey can have tragic effects on its enemies. The drawing shows a traditional relationship between a predator and its prey.


pregnancy (or gestation period)
grossesse f. gestation f

Pregnancy. Conception (or pregnancy). The time that elapses between the beginning of pregnancy and birth in mammals. Human pregnancy lasts for approximately forty weeks, during which the embryo develops within the uterus after implantation. Finger-shaped, brown villi grow from the fetus and develop into the placenta.

The relationship between the uterus and the placenta

The fetal cells divide and differentiate constantly during pregnancy, and the developing fetus becomes suspended in a sac of water, the amnion. The placenta extends into the umbilical cord, which connects to the abdomen of the fetus.

A human fetus immediately before birth
A human fetus after twenty weeks

premolars
premolaires fpl

Windows. Teeth are located in front of the molar teeth.


primary growth (or apical growth)
croissance f apicale



Primary growth (or apical growth). An increase in the length and complexity of the roots and shoots of a flowering plant as a result of cell division, cell elongation, and cell differentiation at the tips of the roots and branches. These growth points are called meristems.


primary sexual characteristic
Caractéristiques fpl sexuelles primaires

Primary sexual characteristics. Features that distinguish between males and females from the moment of birth, with the exception of those that develop at puberty and characterize adulthood. Compare with -secon dary sexual characteristics.


progeny
progeniture f. descendants mpl

Offspring. Offspring. The fruit of reproduction.


progesterone
progesterone f

Progesterone is a hormone secreted by the ovaries in mammals, which prepares the uterus for implantation and prevents ovulation during pregnancy.


protease
protease f

Protein. Enzyme breaks down protein into peptides or amino acids by hydrolysis. For example: pepsin and trypsin.


proteins
proteins fpl

Proteins. Organic compounds contain the elements carbon, hydrogen, oxygen, and nitrogen, and consist of long chains of subunits called amino acids.

These chains can combine with others, and fold in many different ways, and with different types of chemical bonding between chains and parts of chains, which gives very large and very complex molecules.

Proteins form the building blocks of cells and tissues because they are important components of muscles, skin, bones, etc. Proteins also play a vital role as enzymes, while some hormones are proteins in their structures.
. See peptide and amino acids


protoplasm
protoplasm m

Protoplasm The cell membrane and everything it contains inside it, that is, the protoplasm consists of a nucleus and cytoplasm.


pulmonary
pulmonaire

Pulmonary. A description of organs, tissues, and body parts related to lungs and breathing.