英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Gonad - Wikipedia
    A gonad, sex gland, or reproductive gland[1] is a mixed gland and sex organ that produces the gametes and sex hormones of an organism Female reproductive cells are egg cells, and male reproductive cells are sperm [2] The male gonad, the testicle, produces sperm in the form of spermatozoa The female gonad, the ovary, produces egg cells Both of these gametes are haploid cells Some
  • Gonad | Reproductive, Endocrine Hormones | Britannica
    gonad, in zoology, primary reproductive gland that produces reproductive cells (gametes) In males the gonads are called testes; the gonads in females are called ovaries (see ovary; testis) The gonads in some lower invertebrate groups (e g , hydrozoans) are temporary organs; in higher forms they are permanent In some invertebrates, such as oligochaete worms and leeches, both male and female
  • Gonad - Definition, Function and Examples | Biology Dictionary
    Gonad Definition A gonad is a specialized organ that contains germ cells Germ cells are responsible for producing the haploid cells required for sexual reproduction Therefore, gonads – specifically testes and ovaries in humans – allow for sexual reproduction Typically, in sexually reproducing animals each organism has a set number of chromosomes In order to create offspring, these
  • Gonads (Ovaries and Testes)- Definition, Structure, Hormones, Functions
    The male and female gonads are endocrine glands that produce sex hormones essential for the development of reproductive organs
  • Male and Female Gonads: Testes and Ovaries - ThoughtCo
    The gonads in both male and female bodies are crucial for reproduction, with testes producing sperm in males and ovaries producing eggs in females
  • Gonadal Disorders - Johns Hopkins Medicine
    Gonadal conditions can cause menstrual problems in females and disorders of the testes in males Gonad disorders can also contribute to infertility in both males and females Hormone imbalance due to gonad disorders may be treated with hormone medications
  • Gonads - (General Biology I) - Vocab, Definition . . . - Fiveable
    Gonads are the primary reproductive organs in both males and females responsible for producing gametes and sex hormones In males, the gonads are the testes, which produce sperm and testosterone, while in females, the gonads are the ovaries, which produce eggs (ova) and hormones like estrogen and progesterone These organs play a crucial role in sexual differentiation, reproductive cycles, and
  • Gonads: Sex Hormones - BYJUS
    Gonads are the female and male reproductive organs Testes are the male gonads and ovaries in females These reproductive organs are essential for sexual reproduction since they are responsible for the production of male and female gametes Gonads are also responsible for producing sex hormones required for the development and growth of primary and secondary sexual characteristics Gonads: Sex
  • The gonad - Endocrinology - NCBI Bookshelf
    It is self-evident that the sexual dimorphism of human external genitalia is so marked that sex assignment at birth can usually be done at a cursory glance More than 2000 years ago Aristotle thought that the sex of children was determined by the temperature of sperm at the time of copulation Sex in some reptilian species is, indeed, determined by the temperature at which fertilized eggs are





中文字典-英文字典  2005-2009