CIE A Level Biology复习笔记8.1.5 Cells of the Blood
Cells of the Blood Blood is a tissue composed of a number of important specialised cells Red blood cells, monocytes, neutrophils and lymphocytes all have distinguishable structures which enable the...
CIE A Level Biology复习笔记8.1.4 Blood Vessels: Structures & Functions
Arteries, Veins & Capillaries: Structures & Functions Arteries, veins and capillaries all have varying structural features Blood vessels structure & function table Worked example: Blood...
CIE A Level Biology复习笔记8.1.3 Observing & Drawing Blood Vessels
Arteries, Veins & Capillaries: Observing & Drawing Arteries, veins and capillaries have distinctive structures which reflect their differing roles throughout the body The walls of arteries ...
CIE A Level Biology复习笔记8.1.2 The Main Blood Vessels
The Main Blood Vessels The pulmonary and systemic circulations are features of a double circulatory system, where blood passes through the heart twice in one full circuit around the body The pulmon...
CIE A Level Biology复习笔记8.1.1 Circulatory Systems
Closed Double Circulatory System The need for a circulatory system The cells of all living organisms need a constant supply of reactants for metabolism, e.g. oxygen and glucose Single celled organi...
CIE A Level Biology复习笔记7.2.7 Phloem: Mass Flow
Phloem: Mass Flow The Mass Flow Hypothesis was the model initially used to explain the movement of assimilates in the phloem tissue The mass flow hypothesis was modelled by Ernst Münch in 1930. His...
CIE A Level Biology复习笔记7.2.6 The Sucrose Loading Mechanism
The Sucrose Loading Mechanism Assimilates such as sucrose are transported from source to sink through the phloem sieve tubes Carbohydrates are generally transported in plants in the form of sucrose...
CIE A Level Biology复习笔记7.2.5 Movement in the Phloem
Movement in the Phloem Although translocation could refer to the transport of substances in the xylem and phloem, as it means ‘moving from one place to another,’ it is more commonly connected with ...
CIE A Level Biology复习笔记7.2.4 Xerophytic Plant Leaf Adaptations
Xerophytic Plant Leaf Adaptations Xerophytes (from the Greek xero for ‘dry’) are plants that are adapted to dry and arid conditions Xerophytes have physiological and structural (xeromorphic) adapta...
