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 heart, there are cardiac muscles which consists of fibres called
Purkinje fibres
myonemes
telodendria
columnae carnae
