登录
the branch of science that is concerned with the physical structure of humans, animals, or plants
解剖学
a very small threadlike structure in a living organism that carries the genes and genetic information
染色体
a sex chromosome, two of which exist in female cells and only one in male cells
X染色体
a substance that all living organisms produce that brings about a chemical reaction without being altered itself
酶
any foreign substance in the body that can trigger a response from the immune system
抗原
a very small living organism that cannot be seen without a microscope and can cause a disease
微生物
to retain something such as eggs or bacteria in a favorable condition to help them develop
孵化
an offspring of a human or animal that is not born yet, particularly a human aged more than eight weeks after conception
胎儿
an unhatched or unborn offspring in the process of development, especially a human offspring roughly from the second to the eighth week after fertilization
胚胎
a colorless liquid consisting of white blood cells that helps to prevent infections from spreading
淋巴
(biology) a basic type of cell in a multicellular organism, which develops into different kinds of cells with different functions
干细胞
any of a class of organic substances that do not dissolve in water that include many natural oils, waxes, and steroids
脂类
a cell that is responsible for transmitting nerve impulses between the brain and the rest of the body
神经元
a chemical substance that transmits messages from a neuron to another one or to a muscle
神经递质
an organelle that is abundantly present in most cells and is responsible for energy production
线粒体
a steroid hormone that the body produces and is used in medicine to help cure skin diseases
皮质醇
a hormone related to gender that is produced by male body to develop typical male features
睾酮
a hormone that is responsible for controlling the level of glucose in the blood, the lack of which can cause diabetes
胰岛素
(of a cell, gland, or organ) to produce and release a liquid substance in the body
分泌
(biochemistry) a chemical substance that carries the information from DNA to control the cellular protein biosynthesis
RNA
a sense organ or nerve ending that can respond to external stimuli and is able to transmit data to the central nervous system
受体
(of genes) causing a person to inherit a particular physical feature, even if it is only present in one parent's genome
显性
the ordering of nucleotides in DNA molecules that carries the genetic information in living cells
基因组
a hormone primarily responsible for female reproductive development and regulation
雌激素
a cell or a group of cells created through a natural or artificial process from a source that they are genetically identical to
克隆
