Answer:
The correct option is: b. False
Explanation:
The ductus venosus is one of the three shunts of the fetal circulatory system. It is responsible for providing highly oxygenated blood to the inferior vena cava, followed by the right atrium of the fetal heart. Therefore, the main role of this shunt is to bypass the non-functioning liver of the fetus.
Answer:
Ovary-fallopian tube- uterus- cervix- vagina
Explanation:
Female eggs are produced in ovaries. Every month one egg is released by an ovary and this process is called ovulation. Then this unfertilized egg moves to a fallopian tube where its fertilization takes place if sperms are present.
Then the egg fertilized or unfertilized comes into uterus and the fertilized egg attaches in the uterus wall and the formation of placenta occurs and pregnancy starts but in unfertilized egg placenta do not develops and it is shed with endometrium.
Then the broken oocyte leaves the uterus through the cervix and enters the vagina and through the vagina, it exits from the body. So the path is Ovary-fallopian tube- uterus- cervix- vagina.
Answer is a. collagen fibers!
Answer:
Molars are needed for crushing and grinding of food.
Explanation:
The four different types of teeth in the mouth of a human are-
1. Incisors
2. Canines
3. Premolars
4. Molars
Molars are largest teeth and they have a flat biting surface. They are present at the back of the mouth. The main function of the molars is to chew, grind and crush the food so that it is easier to swallow.
Therefore, the teeth needed for crushing and grinding the teeth are Molars.
