The hyoid bone ______.

The __________ is filled with blood and absorbs the cerebrospinal fluid.

At a synapse, the receptors for the neurotransmitters are located ______.

_________ prepare(s) the uterus for receiving a preembryo and maintain(s) the pregnancy.

__________ is the middle membrane of the meninges.

The secretion of estrogens is controlled by ______.

Cone cells are the most densely arranged at the ______.

_________ is characterized by a decrease in blood Ca2+ level, which may result in cardiac arrest and tetany of skeletal muscles.

The X shape of the optic nerves is called the ______________.

Pain in the left chest and left upper limb may be a sign of a ______.