The two long bones in the forearm are the ulna and radius. These two bones artic
ID: 202551 • Letter: T
Question
The two long bones in the forearm are the ulna and radius. These two bones articulate at their proximal and distal ends to form the proximal and distal radioulnar joints. O Observe the ulna and radius on a skeleton. Which one is the medial bone and which is the lateral bone Medjal bone Trochlear notch Radial head Radial tuberosity Proximal radioulnar joint Lateral bone Explain why an understanding of anatomical position is useful fo determinipg your answers Radiusa Ulnar head Ulnar notch Stylold process of ulna Styloid process of radius Distal radioulnar joint Identify the following bone markings. Radius 1. Radial head 2. Radial tuberosity 3. Ulnar notch MAKING CONNECTIONS Styloid process of radius A long bone consists of a diaphysis (the shaft) and two epiphyses (the knoblike ends). Examine a humerus, a radius, and an ulna. For each bone, list the bone markings that form the proximal epiphysis and the distal epiphysis. Ulna 1. Olecranon 2. Trochlear notch 3. Coronoid process Bone Proximal Epiphyss Distal Epiplhys 4. Radial notch 5. Ulnar head 6. Styloid process of ulna Humerus 3 Both the radius and ulna articulate with the humerus at the elbow joint. Identify the bone markings that articulate between the humerus and radius, and between the humerus and ulna at the elbow joint. Radius Articolating BoneS Bone Markings Humerus and Humerus Radius Ulna Humerus and Humerus: Ulna:Explanation / Answer
1.
Medial bone : Ulna
Lateral bone : Radius
The anatomical position of the body is the erect position of the body with face directed forward, the arms by the side and the palms of the hands also facing forward. This position serves as a reference in describing the relation of the body parts to each other. So in the anatomical position the ulna is found on the medial side of the forearm, while the radius is the lateral bone of the forearm.
2. Already marked.
3. Elbow joint
Humerus and radius
Humerus: Capitulum, radial fossa
Radius: Radial head
Humerus and ulna
Humerus: Capitulum, trochlea, coronoid fossa, olecranon fossa
Ulna: Olecranon, trochlear notch, coronoid process
MAKING CONNECTIONS
Articulating Bones Bone MarkingsHumerus and radius
Humerus: Capitulum, radial fossa
Radius: Radial head
Humerus and ulna
Humerus: Capitulum, trochlea, coronoid fossa, olecranon fossa
Ulna: Olecranon, trochlear notch, coronoid process
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