pore present on the sponge’s body through which water enters

(plural: ostia) holes between blood vessels that allow the movement of hemolymph through the body of insects, arthropods, and mollusks with open circulatory systems

one of the earliest jawless fish covered in bone

part of the ear that consists of the pinna, ear canal, and tympanum and which conducts sound waves into the middle ear

thin diaphragm between the middle and inner ears that receives sound waves from contact with the stapes bone of the middle ear

cycle of preparation of egg for ovulation and the conversion of the follicle to the corpus luteum

chamber that contains and protects the ovule or female megasporangium

(also, fallopian tube) muscular tube connecting the uterus with the ovary area

additional pair of appendages present on some arthropods between the chelicerae and pedipalps

process by which fertilized eggs are laid outside the female’s body and develop there, receiving nourishment from the yolk that is a part of the egg

cone containing two ovules per scale

release of the egg by the most mature follicle

female gametophyte

production of ATP using the process of chemiosmosis in the presence of oxygen see citric acid cycle

curve depicting the affinity of oxygen for hemoglobin