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Showing posts with label Science -5. Show all posts
Showing posts with label Science -5. Show all posts

Ailments of the Nervous System

Figure 1: Poliomyelitis Victim


Figure 2: Brain Tumor

Figure 3: Cerebral Palsy

Figure 4: Cerebral Thrombosis

Figure 5: Amnesia

Figure 6: Epilepsy



Figure 7: Meningitis



Figure
8: Paralysis

Figure 9: Encephalitis


Insect Mouth Parts


1.Grasshopper
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/G/grasshopper_mouth.gif

labium

described as the floor of the mouth. With the maxillae, it assists manipulation of food during feeding.


labrum

It serves to hold food in place during chewing by the mandibles


mandibles

being used to masticate (cut, tear, crush, chew) food items.




2. Butterflyhttp://www.insects4sale.com/Head%20butterfly.bmp

proboscis

consists of paired galea which, during feeding, fit together to form a tube that is used to suck up nectar (it acts like a straw)


mandibles

have a sensory function and they are used as hearing organs


Labrum and labium

Used to chew the food and the food then goes into the mouth of the insect




3. Housefly http://www.insects4sale.com/Head%20house%20fly.bmp

Proboscis

Used for sucking out the liquids


labellum

The housefly is able to eat solid food by secreting saliva and dabbing it over the food item. As the saliva dissolves the food, the labellum acts in the usual way.


labium

used to channel liquid food to oesophagus




4. Honeybee
http://t2.gstatic.com/images?q=tbn:IULqDU9Y_FZ5QM:http://www.proscitech.com.au/cataloguex/img/O/o%2520honey%2520bee%2520mouth.jpg

mandibles(jaws)

paired "teeth" that can be open and closed to chew wood, manipulate wax, cleaning other bees, and biting other workers or pests (mites).


proboscis

proboscis is mainly used for sucking in liquids such as nectar, water and honey inside the hive, for exchanging food with other bees (trophallaxis), and also for removing water from nectar


mandibular gland

which secretes a substance once thought to be used to soften wax