proventriculus

As nouns the difference between invertebrate and proventriculus

is that invertebrate is an animal without vertebrae, ie backbone while proventriculus is the part of the avian stomach, between the crop and the gizzard, that secretes digestive enzymes.

As an adjective invertebrate

is lacking a backbone.

As a verb enzyme

is .

As a noun proventriculus is

the part of the avian stomach, between the crop and the gizzard, that secretes digestive enzymes.

As nouns the difference between digestive and proventriculus

is that digestive is a substance that aids digestion while proventriculus is the part of the avian stomach, between the crop and the gizzard, that secretes digestive enzymes.

As an adjective digestive

is of, relating to, or functioning in digestion.

As nouns the difference between crop and proventriculus

is that crop is a plant, especially a cereal, grown to be harvested as food, livestock fodder or fuel or for any other economic purpose while proventriculus is the part of the avian stomach, between the crop and the gizzard, that secretes digestive enzymes.

As a verb crop

is to remove the top end of something, especially a plant.

As nouns the difference between stomach and proventriculus

is that stomach is an organ in animals that stores food in the process of digestion while proventriculus is the part of the avian stomach, between the crop and the gizzard, that secretes digestive enzymes.

As a verb stomach

is to tolerate (something), emotionally, physically, or mentally; to stand or handle something.

As nouns the difference between avian and proventriculus

is that avian is a bird while proventriculus is the part of the avian stomach, between the crop and the gizzard, that secretes digestive enzymes.

As an adjective avian

is characteristic of or pertaining to birds, or to bird-like or flying creatures.