. Label the following on the drawings of the moss life cycle provided: MALE GAMETOPHYTE, FEMALE GAMETOPHYTE, EGG, ANTHERIDIUM, SPERM, ZYGOTE, DEVELOPING ARCHEGONIUM, SPOROPHYTE, EMBRYO, MATURE SPOROPHYTE, SPOROCYTE, CAPSULE, PERISTOME, OPERCULUM, CALYPTRA, SPORES, PROTONEMA, BUD, and RHIZOIDS. Also indicate where MEIOSIS occurs. Draw portions of sections through the tips of moss gametophytes from prepared microscope slides, using the low power of your compound microscope. Show at least one good ARCHEGONIUM and several PARAPHYSES in the FEMALE GAMETOPHYTE and at least one or two ANTHERIDIA and several PARAPHYSES in the MALE GAMETOPHYTE.
Anatomy and Physiology of Special Sensory Organs
Sensory organs can be labeled as special sensory structures that permit sight, hearing, odor, and flavor. Sensory structures permitting proprioception, touch, thermal, and pain perception can be classified as more advanced sensory organs. The sensory neurons are trained to find out modifications in the external and internal conditions so that a person's body can react to that change. A stimulus is the first signal that is recognized by any sensory receptor of the body. Stimulus is an impulse generated when there is a change in the surroundings of a person. For example, a heated environment will alert the brain through the thermal sensory organs and generate a reflex accordingly.
Sensory Receptors
The human sensory system is one of the most complex and highly evolved structures, which processes a myriad of incoming messages. This well-coordinated system helps an organism or individual to respond to external stimuli, appropriately. The sensory receptors are an important part of the sensory system. These receptors are specialized epidermal cells that respond to external environmental stimuli. These receptors consist of structural and support cells that form the peripheral unit of the receptor and the neural dendrites which receive and detect the external stimuli.
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