Answer:
The answer you are looking for is A.
Ligaments connects bones together to form a joint...
this is any help?
Endocrine gland - a group of cells that secretes substances into the blood or directly into an organ.
Differ from exocrine glands, endocrine glands have no ducts and secrete products (hormones) directly into blood.
Hormone - a substance produced by cells that helps specific groups of cells to perform specific functions. It is a product of endocrine gland which functions as chemical messengers to stimulate other cells.
Duct – a channel or tube that conveys a substance. It is part of the exocrine glands (such as salivary glands) which makes contact with surface .
. I think that bivalves have evolved to have smaller head regions because they have also evolved to have bigger shells or valves than cephalopod
