Endocrine glands lack ducts and hence, called ductless glands. Their secretions are called hormones.
Choose correct characters of hormone.
(i) It is a chemical produced by endocrine glands.
(ii) It released into the blood and transported to a distantly located target organ.
(iii) Large number of chemicals act as hormones and provide coordination in the vertebrates.
(iv) Invertebrates possess very simple endocrine systems with few hormones.
(v) Hormones may be peptide, polypeptide, protein, steroids and amino acid derivatives.
(vi) Glucagon, cortisol, epinephrine and thyroid hormones are proteinaceous hormone.
(vii) Hormones are also secreted by some tissues which are not endocrine glands.