Differentiation of the Paraxial and Intermediate Mesoderm, Endoderm by qanda

what are the five regions of the mesoderm of a neurula-stage embryo

They are the paraxial, intermediate, lateral plate, chordamesoderm, and head mesenchyme.

forms the notochord

chordamesoderm

paraxial mesoderm is also called?

somitic dorsal mesoderm

will form the somites that will give rise to the connective tissues of the back

paraxial mesoderm

what are the connective tissues of the back

bone, muscle, cartilage, and dermis

forms the urogenital system

intermediate mesoderm

gives rise to the heart, blood vessels, and blood cells of the circulatory system, lining of the body cavities and to all the mesodermal components of the limbs except the muscles, and a series of extraembryonic membranesthat are important for transporting nutrients to the embryo

lateral plate mesoderm

contributes to the connective tissues and musculature of the face

head mesenchyme

lateral plate mesoderm gives rise to the what (3) of the circulatory system?

heart, blood vessels, and blood cells

lateral plate mesoderm gives rise to the (blank) of the body cavities and to all the mesodermal components of the (blank) except the (blank)

lining; limbs; muscles

the series of extraembryonic membrane are important for transporting what?

nutrients to the embryo

the embryonic mesoderm is for the construction of the what?

lining of two tubes within the body

the two tubes within the body are?

digestive and respiratory tubes

this tube extends throughout the length of the body

digestive tube

buds from the digestive tube forms the? (3)

liver, gallbladder, and pancreas

this tube forms as an outgrowth of the digestive tube

respiratory tube

the respiratory tube bifurcates into what?

two lungs

common chamber in the anterior region of the embryo of digestive and respiratory tubes

pharynx

epithelial out-pockets of the pharynx give rise to the (4)?

tonsils, thyroid, thymus, and parathyroid glands

what are the mesodermal derivatives of the chick embryo?

somites, heart, vitelline arteries, and blood islands

epimere or segmented mesoderm blocks lying beside the spinal cord

somites

the c-shaped tube

heart

arises from the dorsal aorta

vitelline arteries

deeply stained masses in the vascular areas indicative of the soon-formation of blood vessels and blood corpucles

blood islands

what are the endodermal derivatives of the chick embryo?

foregut and anterior intestinal portal

the only region formed at endodermal stage

foregut

first opening of the first opening of foregut to the yolk

anterior intestinal portal

in the pig embryo, the mesoderm layer will become what?

circulatory, skeletal, muscular, and renal systems

the male and female reproductive organs begin forming at what stage?

mesoderm

in pig embryo what arises from the endoderm layer?

digestive system, liver, and lungs of the pig’s glandular organs

what forms around the 16th to 18th day?

esophagus, stomach, and intestines