0
What else can I help you with?
All lymphoid organs develop from mesoderm?
false. NOT ALL lymphoid organs develop from mesoderm.Lymphatic tissues - develop by the end of the fifth week of embryonic development. develop from lymph sacs that arise from developing veins, which are derived frommesoderm.The first lymph sacs -paired jugular lymph sacs at the junction of the internal jugular and subclavian veins. From there, lymphatic capillary plexuses spread to the thorax, upper limbs, neck and head. (Some enlarge, form lymphatic vessels)Each jugular lymph sac retains at least one connection with its jugular vein, the left one developing into the superior portion of the thoracic duct.unpaired retroperitoneal lymph sac -at the root of the mesentery of the intestine. It develops from the primitive vena cava and mesonephric veins. The sac establishes connections with the cisterna chyli but loses its connectionswith neighboring veins.paired posterior lymph sacs, develop from the iliac veins. - produce capillary plexuses and lymphatic vessels of the abdominal wall, pelvic region, and lower limbs - join the cisterna chyli and lose their connections with adjacent veins.anterior part of the sac from which the cisterna chyli develops, all lymph sacs become invaded by mesenchymal cells and are converted into groups of lymph nodes.spleen= develops from mesenchymal cells between layers of the dorsal mesentery of the stomach.
What are 2 defense mechanisms that squid use?
Two defense mechanisms squid use is their ink sac, and also their ability to camouflage. Squid can also move really quickly through their siphon, and jet propulsion.
During what stage does the amniotic sac form?
zygote
Similarities in the development of this early stage of life such as the presence of an amniotic sac show organisms are related?
The presence of an amniotic sac in early stage development points to a common ancestry among organisms. This structure is a shared feature in mammals, reptiles, and birds, suggesting a shared evolutionary history. Organisms with an amniotic sac also exhibit similarities in reproductive strategies and embryonic development, further supporting their relatedness.
Which of these membranes forms a protective sac that surruonds the embryo?
The amniotic sac is the sac in which the fetus develops in amniotes. Its wall is the amnion, the inner of the two fetal membranes. It encloses the amniotic cavity and the embryo.
What is a amnion sac mean?
In the first developmental stage of the embryo, you have the ball of cells. In this ball of cells you have cavity filled with fluid called amniotic fluid. This fluid sac separates the embryo, from the outer non-embryo cells. Later on it encloses the fetus in amniotic fluid to give amniotic sac. This sac is attached to uterus from inside.
Does a grasshopper have an amniotic sac?
Grasshoppers do not have an amniotic sac. Animals with amniotic sacs are mammals and birds that have a sac for the fetus to grow and gain nourishment from.
What is the protective sac around the developing embryo or fetus is the?
The protective sac around the embryo or fetus is the amniotic sac.
The developing embryo is surrounded by a protective membrane called the?
amniotic sac :)
What are the functions of the amniotic sac and fluid?
Amniotic sac and fluid has a protective functions for the fetus. This sac separates the fetus from the mothers tissue.
The protective sac surrounding the embryo is formed by the?
The protective sac surrounding the embryo is formed by the amniotic membrane and the amniotic fluid which together create the amniotic sac. This sac serves to cushion and protect the developing embryo during pregnancy.
What is the site of fetal development?
Fetal development primarily occurs within the uterus, specifically within the amniotic sac and placenta. The amniotic sac contains amniotic fluid that surrounds and protects the fetus, while the placenta provides oxygen and nutrients to the fetus and removes waste products.
Do identical twins share the same amniotic sac?
It can be either. Sometimes they are in their own individual sac, and in other instances they share one amniotic sac.
Fetus is protected by what?
The amniotic sac and amniotic fluid inside the womb.
