in what respect a gland different from any other organs of the body?
- glands secrete substances but not all organs secrete
- glands are tube-like structures whereas other organs are not
- glands have same kind of cells but organs have different cells
- organs function together to form an organ system but glands mostly function independently
- an animal cannot survive without a organ but it can survive without a gland if substances are supplied externally
- mostly organs are more complex and larger than glands