Answer:
All mammals, like dogs, cats, and humans; reptiles, amphibians, fish, birds, and even insects.
Explanation:
All mammals, like dogs, cats, and humans; reptiles, amphibians, fish, birds, and even insects are the animals that have a complete tube-like gut with two openings. A system having a tube with two openings i.e. mouth and an anus is called tubular system. In this tubular system, the animals eat with one opening and the other opening is used for excretion of waste and nitrogenous materials from the body so that's why most of the animals have two openings.
The testicles produce the sperm and the hormones
Answer:
Life Processing I Learnes this last year in 7 grades
Firs one for food poisoning is surgery.
A bacterial cell is compared to a virus because it could possibly kill you.
Nose, hair ears and mouth.
Answer:
The study of internal structures is called anatomy forexample to study the internal structure of heart
Explanation: