Which of the following describe glands? Check all
that apply
a structure that secretes substances through
a duct
a thin layer that separates or connects
Structures inside the body
a structure that secretes hormones into the
bloodstream
a structure usually made from connective and
epithelial cells

a structure that secretes substances through a duct

a thin layer that separates or connects Structures inside the body

Explanation:

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in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.