Chemical messengers for homeostasis (Chapter 3) Endocrine glands do not have particular ducts to carry hormones to various tissues. Hence they are known as ductles…

SENSATIONS AND RESPONSES Stimuli   : The senses that evoke responses in organisms.  There are specialized cells in the sense organs and other parts of t…

Eye Eye socket depressions in the skull External eye muscles fix the eye balls in the orbit Eyebrow Protects…