Malphigian tubules are
excretory organs of insects
excretory organs of frog
respiratory organs of insects
endocrine glands of insects
A.
excretory organs of insects
Malphigian tubules are the excretory organs of insects. It opens at the junction of midgut and hindgut (ileum). They absorb excretory substances from haemolymph and fat bodies. They are concerned with homeostasis, osmoregulation and excretion.
Respiratory organ of insects is tracheae, which opens outside by ten pairs of spiracles.
Endocrine glands of insects consist of corpora allata, corpora cardiaca and prothoracic gland that regulates metamorphosis through different hormonal secretion.
Excretory organs of frog is kidney, large urinary bladder and excretion is ureotelic.
In frog chromosome number is reduced to half
when 2nd polar body is separated
when 2nd polar body is divided
when 3rd polar body is separated
when 1st polar body is separated
The figure shows different human tissues labelled as A to D. Which option gives the correct identification of the label, its location and one feature.
D-Unicellular glandular epithelium, goblet cells, secrete saliva
B-Squamous epithelium, walls of blood vessels, form a diffusion boundary
A-Cuboidal epithelium, ducts of glands, secretion and absorption
C-Columnar epithelium, lining of stomach, secretion and absorption
Pacinian corpuscles occur in the skin of certain parts of body in mammals. These are
type of glands
pain receptors
naked tactile receptors
encapsulated pressure receptors.
Inner lining of blood vessels is formed by
ciliated epithelium
squamous epithelium
cubical epithelium
columnar epithelium
In frog heart, there are cardiac muscles which consists of fibres called
Purkinje fibres
myonemes
telodendria
columnae carnae
