Study of the structure of Nephron.

Study of the structure of nephron: Bowmans capsule, glomerulus, convuluted tubules, capillaries, convuluted tubules, to renal vein, from renal artery.

Study of the structure of human ear.

Human ear showing pinna, semi circular canals, ear drum, auditory canal and choclea.

Demonstration of various parts of human skeleton.

Human skeleton showing metacarpals, skull, pectoral girdle, humerus, ribs, radius, ulna, vertebral column, carpels, pelvic girdle, femur, tibia, fibula, tarsal, metatarsals, phallenges.

Microscopic examination of transverse sections of young dicotyledonous stem and woody stem.

Young dicotyledonous stem showing the vascular bundles, pith, xylem, cambium,phloem,fibers, cortex and epidermis.

woody stem showing bark, sap wood, and heart wood.

Examination of the model of the heart of man.

labelled heart of man: aorta, pulmonary vein, pulmonary artery,superior vena cava, left atrium, pulmonary valve, right atrium, left ventricle, arterio-ventricular valve.

Eosine solution experiment showing ascent of sap in plants.

Demonstration of the ascent of sap in plants by uptake of eosine solution in a herbaceous plant.

How to draw a skeleton quickly...

How to draw a skeleton quickly in an Exam?

We all know that the more elaborate our answers in the paper, the more marks we will get. In Biology paper the elaboration can of course be gotten through drawing diagrams and labeling them correctly. But due to the shortage of time, mostly students skip drawing diagrams and loose an important opportunity. So here are some tips at drawing the human skeleton which should give your Biology paper an extra boost, if you happen to have a question from the unit on Skeleton, movement and Locomotion.

1. Learn to be quick in drawing. this can only be if you do loads of practice. I drew this rough image in less than 2 minutes, including the labeling. I know it is not neat and pretty but it was fast and just a practice sketch. If you can do a rough drawing in 2 minutes, you can make a very tidy one in five (for the Exams).
2. Consider the skeleton to be a man, with a head, two legs, two arms and an abdomen. Instead of flesh however the skeleton will have bones,
3. If you know which bones are where and there rough size and shape, you can make a quick skeleton.
4. As this blog is for the students till their twelfth grades, I will say don't worry about the bony tubercles, facets and tuberosities. Just give each bone a rough sketchy feel, so that it looks professional even though it is not.
5. And finally be very specific about the labeling's, every bone has its own importance so don't mess with their names. labeling's show the Examiner how much you actually know, so be careful with them. have fun with your Biology paper !!!

Star Fish ... An Echinoderm.

Structure of Star Fish...an echinoderm.

Bilateral and Radial Symmetry Diagram.

Bilateral symmetry (structure of Planaria)

Radial symmetry (structure of sea urchin)

Biology Terminology.

• vertebral column = back bone = spine
• wood = secondary xylem
• adrenal gland = supra renal gland
• adrenaline = epinephrine
• afferent nerve = sensory nerve
• air bladder = swim bladder
• alimentary canal = gut = digestive tract
• allelomorphic = pair of alleles
• amylase =diastase
• atrium = auricle
• atrophy = degeneration
• bisexual = hermaphrodite = monoecious
• breathing = external respiration
• caudal = tail
• cell division = cytokinesis
• cellular respiration = internal respiration
• chemo synthetic = chemo autotrophic
• chrysalis = pupa
• cleavage = division
• cork = phellogen
• endocrine gland = ductless gland
• circulatory system = vascular system
• erythrocyte = red blood corpuscle = RBC
• fructose = laevulose
• gamete = germ cell = sex cell
• haploid = monoploid
• glucose = dextrose
• glycogen = animal starch
• golgi body = golgi apparatus = dictyosome
• unicellular = acellular
• gonad = sex organ
• holophytic = photosynthetic
• imago = adult
• inner ear = membranous labyrinth
• integument = skin
• intestinal juice = succus entericus
• invertase = sucrase
• involuntary muscle = smooth muscle = unstriated muscle = unstripped muscle
• kreb's cycle = citric acid cycle
• lamella = layer
• leucocyte = white blood corpuscle = WBC
• mastication = chewing
• meiosis = reduction division
• metameric segmentation = metamerism
• nephron = uniferous tubule = kidney tubule
• ovum = egg cell
• uterus = womb
• pith = medulla
• plasma lemma = plasma membrane = cell membrane
• ptyalin = salivary amylase
• semi permeable = selectively permeable = deferentially permeable
• smell = olfaction
• symbiotc = mutualism
• taste = gustation
• tonoplast = vacuole membrane 
• unisexual = dioecious
• vegetative reproduction = propagation
• voluntary muscle = skeletal muscle = striated muscle - striped muscle
• sarcodina = rhizopoda
• cilliata = cilliophora