Gastrula
A sac that holds venom.
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.
A yolk sac is a sac attached to an embryo, which provides early nourishment for bony fish, sharks, reptiles, birds, and primitive animals.
The pericardium is the sac surrounding the frog's heart.
What is compression of the ventral dural sac?
Flattening of the Dural sac is something that can be observed in patients who suffer from muscular atrophy of distal upper extremities. This means the Dural sac that encloses the spine is restricted and could cause many different things.
to touch the spine
The dural sac covers the spine. Typical causes of dural sac impingement typically include bulging discs, herniated discs, or osteophytes. These conditions can also affect the spinal cord.
A air sac
nutsac
un cul-de-sac (literallly "bag's end") is a dead end street or situation in French.
If you have no symptoms it's just a slightly squashed intervertebral disk, if you do have symptoms it's were they're going to cut. (C5-C6 is low on your neck)
It is not possible to have a gestation sac without the baby, since the sac is a group of cells that separated from the ovule to create the sac. However, something might be something wrong with your glands, thus the low HCG level.
Cul de sac means a court(yard) it is a dead end street.
A dead end street ( the end of a bag)
cul-de-sac