Explain Sperm
Explain the term Sperm. Also describes its structures with the help of diagram.
Expert
The sperm cell is the smallest of all human cells – to give you an idea of how small they are – there are 60 to 90 million (yes, million) sperm in a single millilitre of what exits the man’s body as semen. If this number falls to below 30 million the man is said to have a low sperm count – if it falls to 10 million or lower the man is said to be infertile. A man produces over 100 million sperm cells each day. The sperm’s average length is about 0.05 mm and consists of three main parts: the head, the midpiece or body and the tail.
The tip of the head has a cap called an ACROSOME which contains digestive enzymes. After the sperm has entered the vagina of the woman and has travelled the designated path, the digestive enzymes will eat away the covering of the egg allowing the sperm to fertilize the egg. At any one time there is a multitude of sperm “attacking” the egg trying to be the first one to eat through the protective layer. But what happens when they get through? More to come later! The rest of the head of the sperm contains the nucleus and the 23 chromosomes needed to connect with the egg to form a human fetus. The body of the sperm contains the mitochondria which produce the ATP which the sperm needs for energy. There is a lot of movement in the tiny sperm and they need a lot of energy! The tail of the sperm whips like a flagella and produces the swimming action propelling the sperm forward on its short but important journey.
Explain cell movements? How are such movements made?
Give a brief description of connective tissue proper?
Define the term meninges and cerebrospinal fluid?
Give a brief description of root pressure?
DISADVANTAGES OF BIODIESEL: A) Energy required to produce Biodiesel and ethanol is high per unit of energy they produce by burning. B) Calorific value of bio diesel is less. Hen
How dissimilar are the actions of antibodies against bacteria and virus? Why is the cellular immune response activated in condition of chronic viral infection?
Is there any condition in which DNA is made up based on a RNA template? Name the enzyme comprised of?
Steps of the management by objectives Set organizational goal: first step is to establish the goals each subordinate is to attain. In some organizations superiors and subordinates work together to establish
What is the reason that a long lasting vaccine doesn't exist against common cold yet?
What do you understand by the passive and active immunization? In accordance with, the duration of protection how do these types of immunization differ?
18,76,764
1934627 Asked
3,689
Active Tutors
1458501
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!