In what ways are the internal structures of lungs and intestines similar?

Answer

Villi is present on both of surface

Explanation

Intestine and lungs both have million of villi on the surface .In lungs and intestine villi increase the surface area but purpose is different . In lungs it is use for air exchange and in intestine it is use for food absorption .Both Villi of intestine and lungs are one cell thick and have maximum blood capillaries for food and air exchange respectively .

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.

a- multicellular

b-eukaryotic

c-no cell wall

d-heterotrophic

e-autotrophic