Given below are the names of certain stages/substances related to reproduction and found in human body. Answer the questions related to them,
(a) Foetus.
- Where is it contained ?
- How does it doffer from embryo ?
(b) Hyaluronidase.
- Is it an enzyme or simply a protein ?
- What is its function ?
(c) Morula.
-What is this stage ?
- Name the stage which comes next to it?
(d) Amniotic fluid.
- Where is it found ?
- What are its functions ?
(e) Placenta.
- What are the two sources that form placenta ?
- Name any two main substances which pass from foetus to mother through placenta.
- Name any two hormones it produces.
(f) Implantation.
- The development stage that undergoes this process.
- The approximate time after fertilisation, when it occurs.
Given below are the names of certain stages/substances related to reproduction and found in human body. Answer the questions related to them,
(a) Foetus.
- Where is it contained ?
- How does it doffer from embryo ?
(b) Hyaluronidase.
- Is it an enzyme or simply a protein ?
- What is its function ?
(c) Morula.
-What is this stage ?
- Name the stage which comes next to it?
(d) Amniotic fluid.
- Where is it found ?
- What are its functions ?
(e) Placenta.
- What are the two sources that form placenta ?
- Name any two main substances which pass from foetus to mother through placenta.
- Name any two hormones it produces.
(f) Implantation.
- The development stage that undergoes this process.
- The approximate time after fertilisation, when it occurs.
(a) Foetus: It is contained in the uterus. In foetus, limbs have appeared and resembles the humans unlike the embryo which is a growing or dividing zygote.
(b) Hyaluronidase: Enzyme It is an enzyme secreted by the sperm that allows the sperm to penetrate the egg.
(c) Morula: It is the stage in the development of human embryo which consists of a spherical mass of cells. Blastocyst
(d) Amniotic fluid: Between amnion and embryo It protects the embryo from physical damage, keeps the pressure all around embryo and prevents sticking of foetus to amnion.
(e)Gestation: Gestation is the full term of the development of an embryo in the uterus. 280 days in humans.
(f) Placenta: Placenta is formed by two sets of minute finger like processes called the villi. One set of villi is from the uterine wall and the other set is from the allantois. Oxygen and amino acids. Progesterone and oestrogen.
(g) Implantation: Blastocyst It occurs in about 5-7 days after ovulation.
(a) Foetus: It is contained in the uterus. In foetus, limbs have appeared and resembles the humans unlike the embryo which is a growing or dividing zygote.
(b) Hyaluronidase: Enzyme It is an enzyme secreted by the sperm that allows the sperm to penetrate the egg.
(c) Morula: It is the stage in the development of human embryo which consists of a spherical mass of cells. Blastocyst
(d) Amniotic fluid: Between amnion and embryo It protects the embryo from physical damage, keeps the pressure all around embryo and prevents sticking of foetus to amnion.
(e)Gestation: Gestation is the full term of the development of an embryo in the uterus. 280 days in humans.
(f) Placenta: Placenta is formed by two sets of minute finger like processes called the villi. One set of villi is from the uterine wall and the other set is from the allantois. Oxygen and amino acids. Progesterone and oestrogen.
(g) Implantation: Blastocyst It occurs in about 5-7 days after ovulation.
