WebDec 28, 2024 · The gills are located within the body of the fish behind the head; They are made of gill filaments. These gill filaments are stacked up in a pile; At a right angle to the filaments are the gill lamellae which increase the surface area of the gills; Water is taken through the mouth and is forced over the gills and out through an opening on each ... WebJan 8, 2014 · Biology Unit: KBI0/4BI0 Science (Double Award) KSC0/4SC0 Paper: 1B Wednesday 8 January 2014 – Morning Time: 2 hours You must have: Ruler Calculator Instructions tt Use black ink or ball-point pen. Fill in the boxes at the top of this page with your name, centre number and candidate number.t t Answer all questions. Answer the …
GCSE / A level Biology - Fish Gills and Gas Exchange (Fish …
WebFish use gills for gas exchange. Gills have numerous folds that give them a very large surface area. The rows of gill filaments have many protrusions called gill lamellae. The folds are kept supported and moist by the water … WebNov 26, 2024 · 3.3.2 Gas exchange. Content. Opportunities for skills development. Adaptations of gas exchange surfaces, shown by gas exchange: across the body surface … 4k央视直播源
Mammalian Muscle Structure (5.5.14) OCR A Level Biology …
WebGills of Fish Oxygen dissolves less readily in water A given volume of air contains 30 times more oxygen than the same volume of water Fish are adapted to directly extract oxygen from water Structure of fish gills in bony fish: Series of gills on each side of the head Each gill arch is attached to two stacks of filaments WebMay 5, 2014 · Types of muscle. There are three types of muscle found within mammals. Skeletal muscle (also called striated or voluntary muscle) Smooth muscle (also called involuntary muscle) Cardiac muscle. Skeletal muscles are responsible for moving the rigid skeleton of mammals. These muscles have a complicated, unique structure. WebAlveoli in the lungs, fish gills and the villi in the small intestine are adapted so that they have short diffusion distance, big concentration difference and large surface area. This means … 4k央视直播